JProctor1975
Newbie
New here,
I'm the only owner of my 1994 Z-71 short box regular cab. Bought her off the showroom floor. She's 29-1/2 years old and I wanted to get her some new life for her big 30. I purchased a 300 HP 5.7 long block. Installed it and have had some issues with getting to run smooth. first issue is it runs rich. I've replaced all sensors (twice) and fixed any wiring that could have been questionable. With no improvement. The only thing that I can think of is the Fuel Pressure Regulator. I have rebuilt it (new gasket and spring). Thought of installing an after market one. Any advice would be great!
My second issue is overheating. The dash gauge will say 250 but when I use a heat gun the intake is only at 120 -130. I aim the heat gun at the thermostat housing. I also take a temp reading at the heads and they show 250 to 260. This is by the exhaust manifolds. Because of the location I'm not sure if the reading is a good location or not. Is there a proper location to use a temp gun? I have tested the thermostat and it opened at 190. I replaced the radiator and used a vacuum system to fill the coolant each time. I have also replaced the coolant sensor twice and fixed / replaced the connector. I've checked the ohms and it seemed to be good. Sorry I do not recall the reading I got. Any advice would be great!
I'm the only owner of my 1994 Z-71 short box regular cab. Bought her off the showroom floor. She's 29-1/2 years old and I wanted to get her some new life for her big 30. I purchased a 300 HP 5.7 long block. Installed it and have had some issues with getting to run smooth. first issue is it runs rich. I've replaced all sensors (twice) and fixed any wiring that could have been questionable. With no improvement. The only thing that I can think of is the Fuel Pressure Regulator. I have rebuilt it (new gasket and spring). Thought of installing an after market one. Any advice would be great!
My second issue is overheating. The dash gauge will say 250 but when I use a heat gun the intake is only at 120 -130. I aim the heat gun at the thermostat housing. I also take a temp reading at the heads and they show 250 to 260. This is by the exhaust manifolds. Because of the location I'm not sure if the reading is a good location or not. Is there a proper location to use a temp gun? I have tested the thermostat and it opened at 190. I replaced the radiator and used a vacuum system to fill the coolant each time. I have also replaced the coolant sensor twice and fixed / replaced the connector. I've checked the ohms and it seemed to be good. Sorry I do not recall the reading I got. Any advice would be great!